Does puberty cause alot of depression? and did people enjoy highschool?

i am 15 and have had alot of mood swings and not interested in things as much when i want to be... i think ive been sleep deprived a lil but.... does puberty cause depression? and how to fight it? o and why do some people say high school is amazing... well maybe it could but i have to get up at 5 every morning... the stress of home work and grades and friends all builds up. o and i moved right before high school and went into it without knowing anyone wich makes it very hard. i am halfway through sopre year now. i want to make the best and live my life but is like theres something holding me back. i want to stop worrying abut things so much how i can i stop that? is this normal for 15 year old teenage boy? i just hope it will get better when i get my license like junior and senior year.